Reinsurance (Product information) (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Reinsurance Retention Policy [Line Items]
Maximum amount of life policy risk retained by entity, net of reinsured amounts	$ 1,500,000
Life insurance [Member]
Reinsurance Retention Policy [Line Items]
Percentage of risk reinsured	90.00%
Life Insurance In Force, Net [Abstract]
Traditional Life and UL insurance in force, gross	$ 195,700,000,000	$ 195,100,000,000
Traditional Life and UL insurance in force, reinsured	$ 143,600,000,000	$ 142,800,000,000
IUL and VUL
Reinsurance Retention Policy [Line Items]
Percentage of risk reinsured	50.00%
TrioSource UL insurance [Member]
Reinsurance Retention Policy [Line Items]
Percentage of risk reinsured	50.00%
Single life insurance [Member]
Reinsurance Retention Policy [Line Items]
Maximum amount of life insurance risk retained by the entity	$ 10,000,000
Flexible premium survivorship life insurance [Member]
Reinsurance Retention Policy [Line Items]
Maximum amount of life insurance risk retained by the entity	$ 10,000,000
LTC [Member]
Reinsurance Retention Policy [Line Items]
Percentage of risk reinsured	50.00%
DI [Member]
Reinsurance Retention Policy [Line Items]
Maximum amount of life insurance risk retained by the entity	$ 5,000

Maximum amount of life policy risk retained by entity, net of reinsured amounts

No definition available.

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Namespace Prefix:	amp_
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Balance Type:	credit
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- Definition

Amount of life insurance issued and outstanding ceded to other entity, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column C
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 235
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-17(Column C))
-URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915

+ Details

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Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before effect of reinsurance, of life insurance issued and outstanding, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column B
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 235
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-17(Column B))
-URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915

+ Details

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Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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- Definition

Stated amount that is the upper retention limit per entity policy.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Percentage of risk reinsured on insurance products per entity policy.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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